[MPlayer-users] Getting the best sound from mplayer

Grant emailgrant at gmail.com
Sat Jul 23 21:47:47 CEST 2011


> Hi Grant!

Hello Vladimir!

> I'm not sure. I don't use this one, really; maybe "default" is high
> quality. If resampling quality isn't enough for you (which can be
> perfectly possible, as imho lavc doesn't provide high quality resampling
> unless you manually specify high quality options like higher filter
> length and number of polyphase entries or linear interpolation (if you

How can I set those high quality options?

> use it, no need to increase anything else iirc). Then again,
> lavcresample is said to use only s16le, so your audio will be
> downsampled to 16-bit for sure if mplayer resamples something.

Hmmm, so I can use a lower quality resampler that will leave 24-bit
Blu-Ray audio intact, or I can use lavcresample which is a higher
quality resampler that will convert the 24-bit audio to 16-bit?

>> Doesn't resampling need to take place in order to downmix the 6
>> channels to 2?  My question was meant in the context of that downmix
>> and resampling.
>
> No, you can both "cut off" extra channels or do the work like pan filter
> does in any sample rate and size. Nothing has to be resampled.

Two or more digital audio streams are combined without resampling?
Wouldn't resampling be required in order to accomplish digital mixing
like that?  Maybe you mean the sample rate is not changed during
mixing?

- Grant


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